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Balanced detection in multiport direct-conversion interferometric receiver for IoT aystems

From National Research Council Canada

DOIResolve DOI: https://doi.org/10.1109/JSYST.2023.3337379
AuthorSearch for: ORCID identifier: https://orcid.org/0000-0003-4483-3568; Search for: ORCID identifier: https://orcid.org/0000-0002-9383-3874; Search for: ORCID identifier: https://orcid.org/0000-0001-7442-1017
FunderSearch for: National Science and Engineering Research Council of Canada; Search for: Fonds de recherche du Québec – Nature et technologies. Government of Québec Province; Search for: MTT-S Graduate Fellowship
FormatText, Article
Subjectbalanced detection; energy efficiency; Internet-of-Things (IoT); low cost; low power; multiport interferometry; receiver
Abstract
Multiport interferometric receivers are recognized for their competitive low-power and low-cost wireless sensor solutions. However, the systematically generated rectified wave components in a conventional direct-conversion interferometric receiver can saturate the receiver in a radio propagation environment comprising multichannel signals in the operating band of interest, which requires power-hungry auxiliary building blocks for compensation. In this work, a balanced detection scheme in a radio frequency/microwave interferometric receiver, for the first time, is devised and presented for implementing a differential acquisition. This method is based on the phase opposition of the local oscillator (LO) driving signal measured between a pair of Schottky diodes. The subtraction of two outputs is set to cancel unwanted rectified signals and improve the desired detected signal quality. A prototype is implemented in the 60-GHz frequency band using a miniature hybrid microwave integrated circuit fabrication process, which can be extended to any frequency band of interest and fabrication technology. The balanced detection scheme shows an excellent suppression of second-order distortions and about 6-dB conversion gain improvement of the detected signals in comparison to a conventional interferometric receiver employing a single-ended detection scheme. The demodulation of several modulated digital signals has been successfully demonstrated, which only requires about 25% of the driving signal power to have a similar error vector magnitude performance as with the single-ended detection scheme when probing an intermediate frequency detected signal.
Publication date
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
In
  • IEEE Systems Journal 18, no. 1 (12 December 2023): 612–619.
LanguageEnglish
Peer reviewedYes
NRC publication
This is a non-NRC publication

"Non-NRC publications" are publications authored by NRC employees prior to their employment by NRC.

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Record identifierd4942ce3-5860-48bc-aca9-7c1c9fb092ed
Record created2024-08-28
Record modified2025-11-03
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